ARROW-18131: [R] Correctly handle .data pronoun in group_by()

[thisisnic]

No description provided.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-18131

[paleolimbot]

Thanks! I ran revdeps with this branch and confirmed that it fixes the check.

[ursabot]

Benchmark runs are scheduled for baseline = 33f2c0e and contender = eb01350. eb01350 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Failed] ec2-t3-xlarge-us-east-2
[Failed] test-mac-arm
[Finished ⬇️0.0% ⬆️0.0%] ursa-i9-9960x
[Failed] ursa-thinkcentre-m75q
Buildkite builds:
[Failed] eb01350b ec2-t3-xlarge-us-east-2
[Failed] eb01350b test-mac-arm
[Finished] eb01350b ursa-i9-9960x
[Failed] eb01350b ursa-thinkcentre-m75q
[Failed] 33f2c0ec ec2-t3-xlarge-us-east-2
[Failed] 33f2c0ec test-mac-arm
[Finished] 33f2c0ec ursa-i9-9960x
[Failed] 33f2c0ec ursa-thinkcentre-m75q
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java